package number;

public class offset {
	public static void main(String args[]) {
		StringBuilder bf=new StringBuilder("hello");
		bf.insert(5, "world");
		System.out.println(bf.toString());
		StringBuilder gt=new StringBuilder("filghter00000000000r");
		gt.delete(5, 10);
		System.out.println(gt.toString());
	}

}
